Secondly go to the directory containing files need to be converted.
For files with GBK tags:find . -iname "*.mp3" -execdir mid3iconv -e GBK {} \;
For files with BIG5 tags:find . -iname "*.mp3" -execdir mid3iconv -e BIG5 {} \;
There is a good thing that the program could check if the encoding we selected is suitable, so when we convert GBK encoded files, the BIG5 ones won’t be changed. But please don’t use GB18030 option because it will cause problem when the file aren’t really GB18030 encoded.